Sum One’s Birthday Card

It’s sum-one’s Birthday everyday! So why not send them this awe-sum card with your nerdiest birthday wishes. This yellow card shows a summation equation in mathematics, indicated by the sigma symbol.

Greeting:  it’s sum-one’s birthday
Inside:  blank
Size:  A2, 5.5 x 4.25 in (14 x 10.8 cm)
Quantity:  1 card with envelope




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A Short Winter Break!

Thank you so much for supporting my creative science + math shop this year!  The Chemist Tree will be taking a short Winter Break from Dec 14, 2024 to Jan 5, 2025. 

All orders received after Dec 13 will be mailed out by Jan 11.

Happy Holidays and see you in the New Year!